Yang Zhengpeng, Lv Xiaoting, Liu Xuqing, Jia Shengmin, Zhang Yongyi, Yu Yingying, Zhang Chunjing, Liu Dandan
Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China.
Key Laboratory of Multifunctional Nanomaterials and Smart Systems, Advanced Materials Division, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
Nanomaterials (Basel). 2021 May 19;11(5):1335. doi: 10.3390/nano11051335.
Continuous-flow photoreactors hold great promise for the highly efficient photodegradation of pollutants due to their continuity and sustainability. However, how to enable a continuous-flow photoreactor with the combined features of high photodegradation efficiency and durability as well as broad-wavelength light absorption and large-scale processing remains a significant challenge. Herein, we demonstrate a facile and effective strategy to construct a sieve-like carbon nanotube (CNT)/TiO nanowire film (SCTF) with superior flexibility (180° bending), high tensile strength (75-82 MPa), good surface wettability, essential light penetration and convenient visible light absorption. Significantly, the unique architecture, featuring abundant, well-ordered and uniform mesopores with ca. 70 µm in diameter, as well as a homogenous distribution of TiO nanowires with an average diameter of ca. 500 nm, could act as a "waterway" for efficient solution infiltration through the SCTF, thereby, enabling the photocatalytic degradation of polluted water in a continuous-flow mode. The optimized SCTF-2.5 displayed favorable photocatalytic behavior with 96% degradation of rhodamine B (RhB) within 80 min and a rate constant of 0.0394 min. The continuous-flow photodegradation device made using SCTF-2.5 featured exceptional photocatalytic behavior for the continuous degradation of RhB under simulated solar irradiation with a high degradation ratio (99.6%) and long-term stability (99.2% retention after working continuously for 72 h). This work sheds light on new strategies for designing and fabricating high-performance continuous-flow photoreactors toward future uses.
连续流光反应器因其连续性和可持续性，在污染物的高效光降解方面具有巨大潜力。然而，如何使连续流光反应器兼具高光降解效率、耐久性、宽波长光吸收以及大规模处理能力，仍然是一项重大挑战。在此，我们展示了一种简便有效的策略，用于构建具有优异柔韧性（180°弯曲）、高拉伸强度（75 - 82 MPa）、良好表面润湿性、基本光穿透性和便捷可见光吸收能力的筛状碳纳米管（CNT）/TiO纳米线薄膜（SCTF）。值得注意的是，独特的结构具有大量、有序且均匀的中孔，直径约为70 µm，以及平均直径约为500 nm的TiO纳米线均匀分布，可作为“水路”，使溶液通过SCTF高效渗透，从而实现连续流模式下对污水的光催化降解。优化后的SCTF - 2.5表现出良好的光催化性能，在80分钟内对罗丹明B（RhB）的降解率达96%，速率常数为0.0394 min⁻¹。使用SCTF - 2.5制成的连续流光降解装置在模拟太阳辐射下对RhB的连续降解具有出色的光催化性能，降解率高（99.6%）且具有长期稳定性（连续工作72小时后保留率为99.2%）。这项工作为设计和制造面向未来应用的高性能连续流光反应器提供了新策略。
